Abstract
Background. In recent decades, the number of reverse shoulder arthroplasties has increased significantly, and the number and diversification of complications has also increased.
Objective. This study aims to analyze the structure and nature of mistakes and complications that occur during reverse shoulder arthroplasty.
Materials and Methods. We observed 21 patients (20 males and 1 female) aged 36 to 81 years (mean age 54.61 ± 11.89 years) who underwent reverse shoulder arthroplasty. Among them, 16 cases of complications and 5 mistakes were identified.
Results. In 2 patients, strategic mistakes led to the development of complications. The complications were diverse. The most common was prosthesis dislocation (5 cases, 23.8% of the total number of complications and mistakes). Purulent-necrotic complications were observed in 4 patients (19%), aseptic instability of the prosthesis components occurred in 3 patients (14.3%), acromion stress fractures due to overload were noted in 2 patients (9.5%), and secondary adhesive capsulitis with severe adduction and internal rotation contractures was observed in 2 patients (9.5%).
Conclusions. The most common complications following reverse shoulder arthroplasty were prosthesis dislocation and purulent-necrotic complications. The main causes of dislocation were uncompensated shortening of the humerus and significant medialization and, in some cases, inclination of the prosthesis head. A strategic mistake in reverse shoulder arthroplasty is performing the procedure in patients with total traumatic injury to the deltoid muscle or irreparable damage to the axillary nerve (n. axillaris). An important tactical mistake is neglecting, when possible, the complete restoration of the rotator cuff, which significantly reduces flexion and rotational movements in the shoulder joint.
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